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NI 9212 Calibration Procedure
13. Loosen the captive screws and remove the top cover from the NI CAL-9212.
14. Disconnect the calibrator from the NI CAL-9212.
15. Short the TC+ and TC- terminals on the NI CAL-9212 together.
16. Reinstall the top cover on the NI CAL-9212.
17. Acquire and average samples.
a.
Create and configure an AI voltage channel on the NI 9212 according to Table 2.
b.
Configure the AI voltage channel timing according to Table 3.
c.
Start the task.
d.
Average the readings.
e.
Clear the task.
18. Compare the average to the limits in Table 5.
Note
The test limits listed in Table 5 are derived using the values in Table 11.
19. Repeat steps 17 through 18 for each ADC timing mode on the NI 9212.
20. Remove the NI CAL-9212 from the NI 9212.
21. Loosen the captive screws and remove the top cover from the NI CAL-9212.
22. Disconnect the short from the NI CAL-9212.
CJC Verification
Complete the following procedure to determine the As-Found status of the NI 9212.
1.
Loosen the captive screws and remove the top cover from the NI CAL-9212.
2.
Connect the calibrator to the NI CAL-9212, as shown in Figure 4.
Table 5.
NI 9212 Voltage Verification Test Limits for Zero Test Points
ADC Timing
Mode
Range (mV)
Test Point
1-Year Limits
Min
Max
Location
Value
(mV)
Lower
Limit (mV)
Upper
Limit (mV)
High
Resolution
-78.125
78.125
Zero
0
-0.0051
0.0051
Best 50/60 Hz
Rejection
-0.0052
0.0052
High Speed
-0.0056
0.0056
